5.8 OEGetPhi

double OEGetPhi(OEHierResidue &res);
double OEGetPhi(OEChem::OEAtomBase *atom,
                unsigned assume = OEAssumption::Default);

This function returns the phi angle in radians for a residue specified by its OEHierResidue class or by and OEChem::OEAtomBase from the residue.